Draft and buffing rigging.



PIATENTED MAY 19, 1908.

R. 1). GALLAGHER, JR. v DRAFT AND BUFPING RIGGING.

APPLICATION FILED JAN, 6. 1904.

2 SHEETS-SHEET 1.

No. 888,436. PATENTBD MAY 19, 1908.

R. D. GALLAGHER, JE- DRAFT AND BUPPING RIGGING.

APPLICATION FILED JAN. 6, 1904.

2 SHEETS-SHEET 2.

. lates more and assemb age of the elastic and triction UNITED STATES PATENT OFFICE.

RICHARD D. GALLAGHER, JR.,' OF NEW YORK, N. Y., ASSIGNOR TO STANDARD COUPLER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

DRAFT AND BUFFING RIG-GING.

Specification of Letters Patent.

Patented May 19, 1908.

Original application filed. November 22, 1902, Serial No. 182,432. Divided and this application filed January 8, 1904. Serial No. 187,977.

To all whom it may concern.

Be it known that I, RICHARD D. GALLA- oiiER, Jr., of New York, in-,the county and State of New York, have invented certain new and useful Improvements in Draft and BuffingRigging; and I do hereby declare the following to he a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this s ecification, and to the figures and letters of reference marked thereon.

This application is a division of my prior application Serial No. 132,432, Series of 1900, filed November 22, 1902, and like the invention contained in said prior application this invention relates to improvements in draft and buffing ri ging for railway cars, although features of aie invention are applicable to any mechanism employed for the purpose of yieldingly resisting the relative move ments of arts.

The ob ect of the invention is to provide a structure having elasticity so modified by friction that the elastic resistance to compressive strains is vastly augmented and the recoil reduced to a minimum, which structure shall be self contained and the friction created by the direct action of the elastic member or members, thereby avoiding the necessity of employing separate elastic and friction members.

The invention of the present (llVlSlOll rearticularly to the construction members and consists essentially of a series of elastic friction members interposed between a series of substantially corresponding but inelastic friction members, both of said series of members having inclined friction faces, the said friction faces being inclined both to the plane of elasticity and to the line of pressure, whereby upon the application of pressure the elastic elements will, through the action of the inclined friction faces, be put under strains transversely of the line of pressure, the friction above the inclined faces augmenting the resistance of the elastic members in one direction and resisting the recoil movements of the elastic elements in the opposite direction.

The invention further consists in certain novel details of construction and combinations and arrangements of parts all as will be now described and pointed out particularly in the appended claims.

Referrmg to the accom anying drawings- Figure 1 is a sectional e evation of a device embodying the present improvements and Fig. .2 is a transverse section of the structure illustrated in Fig. 1. Fig. 3 is a cross section showing a slightly different form of friction elements.

Like letters of reference in the several figures indicate the same parts.

In the ap lication of the invention to draft and bu g rigging of railway cars, ordinary appliances are employed for transmitting the draft and b'ufling strains thereto such, for instance, as the draw bar and tail strap A and B of the accompanying drawings and for which any other preferred and well known devices may be substituted.

The pressure resisting member itself may be held between stops of usual character located on the draft timbers as illustrated conventionally at C in said drawings, the said pressure resisting member bein thus substituted in the position of the usua draft and buffing springs.

D and D indicate end followers which are preferably rectangular as shown in Fig. 2, and which are adapted to be located between the stops C and to be surrounded by the draw bar yoke or tail strap. The inner surfaces of the followers D and D are provided with inwardly projecting portions 11 and d preferably hollow and circular in form. A bolt E extends through alined openings concentrically formed in the ortioiis (Z and cl of the followers and is retainedin position .by a nut e, the head-of the bolt ant nut e lying within the recesses formed in the heads (1 and d respectively and in such position as to prevent injurious contact with the draw bar or tail strap as will be readily understood.

Interposed between the followers are a series of abutting pairs of frictional elements, each pair composed of a resilient and an adjoining non-resilient member having co'- operating frictional surfaces; F F F indicating the non-resilient members and G G G indicatin the resilient members. Inwardly inclined peripheral friction surfaces f f f are formed u on the non-resilient members F F F sai surfaces cooperating with corresponding surfaces on the adjoinin resilient members G G (3* G respectively.

%n the particular embodiment of the invention illustrated in Figs. 1 and 2 the friction elements are shown associated with ordinary springs, one of said springs H being arranged centrally within the friction members and extending between the heads D D while the other of said springs H is arranged at one end of the friction members and is confined between head D and aspacer H which is interposed between the said spring and friction element, the spacer H thus forming a supplementalhead or follower, and in order to give additional protection against the entry of dirt a casing H is mounted on the intermediate head H and extends around both the springs and friction members.

The heads between which the friction members are confined, are preferably provided with inclined friction surfaces f corresponding to the inclined friction surfaces on the friction members and thus in efiect constitute non-resilient elements of the combination. In order to limit the cbmpressive movements, alternate members of said friction elements are preferably rovided with flanged outer peripheries w ich flanges, lettered g, g, g 9 Fig. 1 of the accompanying drawings, will abut or come in contact with each other when the device is subjected to strain, and the flangesof the members or elements adjacent the heads will contact with the heads. The limit of movement is therefore determined by the spaces between the flanges on the friction elements and as a consequence the extent of movement may be controlled so as to prevent undue strain in the elastic elements.

In some instances, .it may be desirable to form the rings in pairs, the rings of each pair operating upon each other to roduce lateral expansion or contraction of t e rings and to provide friction surfaces between the pairs which will be. operative to create friction when such expansion or contraction takes place, but without any. tendency to cause such movements. In Fig. 3 the cross sectional shape of the rings is so modified as to effect this, as well as to secure increased strength by an advantageous disposition of the material in the rin s. The pairs of rings are indicated by the letters F and G the rings F being non-resilient and the rings Gr resilient. Said rings have annular inclined contacting or cooperating friction faces as before and substantially parallel or radial side faces f 4 and g, the latter faces in no Wise tending to deflect the rings, but relative transverse movements of the rings cause said faces to slide'upon.each other and produce friction in. proportion to the pressure forcing assess rings and constitute inelastic elements in the combination. the former, alternate elements of the combination are provided-with flanges f 5 which serve to limit the compression of the elements and consequently prevent-the elastic elements from being strained beyond their elastic limit.

It is obvious that the resisting capacity of the assembled apparatus may be lncreased or diminished by varying the 'thickness or strength of the elastic members or rings or by varying the inclination of the engaged frictional surfaces.

While I have described more or less precisely the details of construction I do not wish to be understood as limiting myself thereto, as I contemplate changes in form, the proportion of parts and the substitution .of equivalents as circumstances may suggest or render expedient without departing from the spirit of my invention. v

Having thus described my invention, what I claim as new and-desire to secure by Letters.

Patent, is:

I. A frictional device comprising a series of abutting pairs of frictional elements, each pair composed of a resilient and a n'on-re'- silient member, said members alternating with each other and having cooperating frictional faces.

2. A frictional device comprising a series of abutting pairs of frictional elements, each pair composed of a resilient and a non-resilient member, said members having cooperating inclined frictional faces.

3. A frictional device comprisinga series of abutting pairs of frictional elements, each pair composed of a resilient and a non-resilient member, and the cooperating faces of the members being alternately inclined and radial. v

4. In an apparatus of the character described, the combination with a series of annular members comprising yielding members In this latter instance, as in iii) and having complemental inclined friction faces, and the yielding members of which series are put under transverse elastic stress by the cooperation of the inclined faces, of flanges on alternate members adapted to abut and limit the range of elastic movement; substantially as described.

5. In an apparatus of the character described, an annular friction element having a peripheral flange for limitin the range of elastic movement; substantial y as described.

RICHARD D. GALLAGHER, JR.

Witnesses:

A. HAMILTON Cooxn.

Tex-ones DURANTT 

